Process of infolding paper-container bodies and the like



Ma '3 19 l,627;049

y 27 A. MQoRE PROCESS OF INFOLDING PAPER CONTAINER BODIES AND THE LIKE Filed June 21. 192s 2 sheets-smet 1 G E Nw NQ m m w N Mplmqg@ 1 f www@ QW IA mwhwu-.- L MW 1 A O@ m@ QK NM mv my w. T EN Ww H. fNqW QM. \h Nm. m, m E, v .5 O 3 0 di NWS mm Nw NW Nk. fo NN 6W. GEW.- I @Q H Q@ %Q\ QN .Nk QE QW: n, 0 w n MQ y A. MOORE PROCESS OF' INFOLDING PAPER CONTAINER BODIES AND THE LIKE 2 Sheets-Sheet 2 Filed June 21. 1926 INVENTOR fa /N 70N A70 OEE ATTORNEY 'Patented' Mey 3, i927.

'u NirED "str-A 'Taf Appiimmn megane-21,1926. serial No1-11am.

M invention relates to a process of in- ,folding paper container -bodies and other,

bodies or shellsof paper or paper-like material. The process is adapted for forming lindrical, conical and' other, forms, and is la renforced margin on paper shells 'of cyalso adapted to the formation of interlocked seams between suoli shellsor bodies and`inserted Ilan ed lheads, as inthe case ofmaking interlocke heading joints l or seams for fpaper container.

,The presentV invention provides an extreinely simple and eflicientway of insuring that the original free edge-'or raw edge as it issometimes calledof the shell shall be turned in so afs toi become buried `within the inturned folds, as in the case of the. shell with reenforced margin, or within the seam or joint vin the case of interlocked seams bei tween shells and container heads. The advantages of thus disposing of the raw edge are numerous and include putting the raw edge out of sight, thereby enabling the productionof a finely finished and good appearing product not possible with the'raw edge exposed, the elimination of'edge capillarity, which isof importance in containers to hold liquids, added strength and rigidity, and related featuresof advantage. A

In my Patent No. 1,413,7' 59, granted April 25, 1922, I have shown a mode of tuckin the raw edge in by, means of a tool provide with a terminal hook. The presentprocess accomplishes a similar result in a much sim, pler way and entirely eliminates the hook and the somewhat complicated movements and manipulations incident to its use, and is more certain and 'efficient in operation.

When a paper -shell is rotated relatively .I to a suitably arranged edge turning tool, the

edge of the shellwill be spun or turned in progressively so long as the tool is advanced gradually, and if the edge turningtoolfcomprises a finger extending` down within the shell, this turned in part can be made to lie flat'against-theinterior of the shell, or, in other words, parallel thereto, with the raw edge exposed at the inner or leading edge of' the inturned fold.

I have :found that with the same turning tool and having a simple unhooked fin er, such inturned portion can be inturned bo ily by a relatively uick or sudden advance of the turning too with respect tothe relatively rotating bod or shell of paper, thus converting a twoold margin into a triple folded margin in wlii'chithe part, which was first 'turned 'inwardly 'by ,progressive advance ofthe' turning tool, is directed backwardly, bringing 'the raw edge into the interior-of the triple fold so produced.` At the time of the sudden or quick advance ofthe foldingoi" turnin tool, if the .pressure finger extending within the -shell is moved inwardly, or toward the shell axis a sucient distance it )vill accommodate the additional inturned thicknesses and press it flat.

A like result can be obtained where; an interlocked joint is to bc produced between a slielly and an inserted fianged head, but in this case there are, of course, a reater num- P'a'iianiii oFFicE.

miraron noonn, or maw Yoan, N. x.

By utilization of this principle,-as by re- I peated applications of the quick advance of the turning tool and by variations in the point at which and extent to which ap lied,

4 a great variety of infolds can be pro uced in paper articles in order to meet the requirements which may be presented, but in all cases the raw margin is infolded and buried or embeddedwithin the multiplejold of the paper, without the necessity of utilizing hooks yor guides or other devices to guide th raw edge into the desired infolded and embedded position.

' The accompanying drawings illustrate the steps of the process and sufiicient apparatus `for showing how the process can be carriedinto effect, but the apparatus shown is illustrative only and various mechanisms, referably automatic machines, may beuseg.

In said drawings, Fi 1 is a fragmentaryl peatingl the showing ofvthat part of Fig. 1

relating to the forming of an interlock seam,- with the apparatus omitted from the showmg' i l Figs. 6 and 7 are plan views showing` how the inturned tool and linger are moved in to accommodate additional linturned thicknesses of material.

Fig. 8 is a section of a quadruple inturned paper shell margin.

ig. 9 1s a section of a triple inturned paper shell margin pressure formed into a' Fig. 11 is a section of a consolidated livefold interlock heading seam.

Fig. 12 is a section of-a seven fold interlock seam.

' 'In referring to the various folded seams, I prefer to designate same bythe number of thicknesses thereinand to include the nonfolded shell or body part, though this part -is strictly not folded.

In the showing of Fi 1,the paper shell is held in a chuck 22 y a plug 24, which `rotates with the shell and chuck and forms an abutment for the Hanged bottom 26.

y `Chuck 22 is shown as rotatable and the tools as non-rotatable, though this relation may be reversed, if desired, or both may rotate in lo posite directions or/and at differinl spee s. As shown, chuck 22 turns on bal bearings 28, 30 and is driven by a gear 32 meshing with gear teeth 34 on the chuck 22.

The shell 20 projects beyond the ends of the chuck to provide projecting material for formation into the reenforced margin or seam.

A turning tool 4() is arranged to extend across the projecting shell edge on a chord of the circle defined by such projectinggedge (see Figs. 6 and 7). 4In the form shown, such tool is made of a piece of round drill rod, but tools of other forms may be used.

On its inner end the turning tool is provided with or extended to form a finger 42 adapted to/n-ake contact with the inner side of the folds as they are inturned and to press same Hat, or in other words, to'com- `plete the turning movement through substantially 180. This linger 42 is smooth and substantially` straightI and has no hook or similar arrangement for tucking in the raw edge.

Provision is made for moving tool 40 to bring finger 42Xthereof radially in and out and for applying` suicient pressure to fold the paper into flat folds, and in the simple illustrative .apparatus shown for hand operation, this is accomplished by mounting the turning or folding pin 40 to turn in abearing 44in a bracket 46, and providing a hand operated handle 47 and an adjustable stop 47 for limiting the outward movement of pin 40 Weight 65.

rack teeth 54 formed in slide bar 48. As..

shown, this sector 52 is hand operated, being operated by the handle or crank 56.

The rapid advancement of slide 48 and tool 40 is produced by means of the expansion spring 58, which encircles slide 48 between bracket 46 and bearing 50. A collar 60 limits the advance movement of slide 48 by contact with bearing 50. In order tol divide the movement into suitable steps or parts, I may provide one or more insertable and removable stop and release devices, as the swinging arm 62 having a stop head 64, adapted to be inserted between bearing and collar (see Fie. 3) or to be swung aside (Figs. 1 and 2 ,by pulling on the counterweight or handle 65 thus permitting slide 48 to be advanced by spring 58 from the position of Fig. 3 to that of Fig. 1. Am adjustable stop 66 serves to limit the retractile movement of slide 48; Pin 68' in bearing 50 is pressed inwardly by leaf spring 70 and is adapted to lockv slide 48 in retracted positionby entering a hole 72 therein. The slide may be released by lliftmg pin 68 by means of knob 74.

At the beginning of the operation, with the apparatus described, and hav'ng reference now to the inturning of thee ge of the shell alone without the inserted flanged head, the operator grasps crank 56 in one hand and pulls out stop pin 68 with the other to release slide 48. He then4 backs off gradually with handle 56 and thereby permits pin 40 to be advanced by expansion of spring 58 against the edge of the rotating shell 20, While he holds the finger 42 by means of handle 47 against the inturning edge and forms a flat fold, and thus performs the eperation illustrated in Fig. 3. While this adual advance of pin 40 is taking place t e shell is rapidly rotating, and a considerable number, say 50 to 100, revolutions of the shellmay take place during this interval in Which the turning pin is gradually advanced, this step being terminated by the collar 60 of slide 48 coming to rest against the hinged stop piece 64, which is held up against the slide bar 48 by the counter- (See Fig. 3.) The stop 47 prevents pushing handle 47 and finger 42 .too far in the operation of holding finger 42. against the fold 104 as the latter is being turned in, while the gradual advance of pin 40 is taking place.

'llo perform the second step which is the lll) abruptly advanced principal featurelof the present invention, the operator still holding handle y,47, but having moved 'it to brine the finger 42 inwardly somewhatI from the position of F1g. 6 .for the first step to that of Fig. 7 to accommodate additional thicknesses of paper, releases crank 56 of sector 52, and pulls on handle 65 of hinged stop arm 62, thereby withdrawing sto head 62 from between the collar 60 and shall, bearing 50. This releases slide 48, which u on being released is y the` spring 58 from' the position shown in Fig. 3'fto that shown in Fig. 1. This advance, instead of being gradual and distributed over a larger number of shell rotations, is quick and abrupt and probably is 'complete in considerably less than a single rotation of the shell. Its effect `is to form a new fold line 102 at the place where the advancement of pin is s'to ped,

' as in the case under discussion, such a rupt advance is stopped by collar coming into contact with slide bearing 50.

AWith the abrupt advance of the turning pin, there is no longer-a gradual progressive turning over of the paper of the shell, but everything outside the new fold line is fold= ed in bodily at the vnew fold line and this bodily folding over is completed by the finger 42. I n the case of the paper having first been gradually turned or spun into a double fold with the raw edge oposite or substantiall opposite the new fol line, the resultlng prodilct after the abrupt turn is completed will be a triple fold margin, as shown at the upper right Hand part of Fig. 1', with the originally folded in part 104 turned backward and the raw edge buried immediately Bur inside the new fold line. Stateddiferently, the triple fold margin will include'three thicknesses, the container body Wall thickness 105 at the outside, the inturned fold part 106 on the inside, and the original margin fold 104 extending reversely between them and with the raw edge buried or embedded within the space between the inner and outer folds.

Such tripleinturned fold has many uses. In Fig. 9, for example, I have shown same comprising folds 104', 105 and 106', shaped by suitable shaping or. spinning tools into a reenforced firkin margin with an internal lid seat 107 adapted to receive a disk lid, and it will be seen how with such construction capillarityabsorption of liquids contained in the container is precluded by the raw Iedge being removed entirely from any possibility of contact therewith.

In Fig. 8 I have shown a quadruple folded marginal part comprising folds 108, 110, 112 and 114, which can be provided by performing a second abrupt inturning operation such as described, a'nd it will be apparent that many variations can be produced by varying the number of folds, the Width and brder of folds, and the place or-places where the various fold lines are located.

, Theoperation is much the same where an inserted flanged head is to be formed into a joint or seam with the margin of a paper' shell. The formation of the simplest form of joint so made up is illustrated at the left vha-nd end of Fig. 1, and in Fig. 5. Here the originalf'shell margin 200. extends beyond the fiange margin 202 and is spun in thereover by the customary,gradual spinning 0peration as shown at the lower left hand part of Fig 1, and as shown-in Fig. 5 in full lines g at the upper right hand part of the figure.

When the abr'uptiinfolding is done on a new fold line located at about the middle of, the a'nge height, the resulting folded joint is jot the quintuple type shown at the upp .r left hand part of Fig. 1, and in dotted lines in the right hand part and in full lines at the left hand part of Fig. 5, including, interlocked with the triple folded parts v200, &204, 206 of the shell, the double^folded parts 202, 203 of uw, head or bottom flange. In

As inthe case of the simple folded shell,

margin the folded seam including shell'and lid ange may be Vproduced in a'variety of forms depending on the number of abrupt turns and locatlon ofr abrupt turn or fold lines. For example, the form 212 of Fig.v 12 having seven thicknesses is produced by making a second abrupt fold of a suitably extended lid flange and body Wall. `The form 214 of Fig. 10 having six folds is produced by extending the shell margin considerably beyond the lid flange and gradually spinning the-shell material back upon itself beforeinfolding with the lid flange, and'varions other forms may be produced in carry-k ing out the principle of the invention.

I claim:

' 1. The process of making a multiple fold A margin on a shell of paper, which lconsists in rotating same relative to 'a spinning tool,

advancing the tool gradually relative to the shell to foldin the margin, and then advancing the tool abruptly, whereby the turned in raw edge is reversed and a fold reduced in which the raw edge,A is enclosed 'between folds or thicknesses of paper.

2. In the process of multiple infolding the wall of a paper shell, the steps of turning in the margin, and then abruptly turniin ing over the infolded-vma'rgin and adjacent y shell wall together.

Lly ofthe shell substantially parallel to the shell walls, advancing the tool relative to the vrotating shell to 'turn themargin inwardly,

and then abruptly advancing thespinnin tool with res ect to the rotating shell an moving the inwardly extending fool part toward the shell axis to accommodate additional thicknesses of paper, wherebythe re- -viously infoldcd margin and adjacent s ell wall are turned in `bodily on a new fold line with the original edge of the shell between the folds and directed in the same sense as originally.

4. In the process of making folded margins on paper shells, the step of abruptly advancing a spinning tool relat1vely to a relatively rotatlng shell having its edge previously turned in, whereby the turned in edge and adjacent wall portion are bodily reversed on a new fold line. v

5. ,The proces ofmaking on paper shells an infolded margin having, with the inclu jsion of the adjacent wall part, three folds,L which includes the step of inturning the edge of the shell, and then abruptly infolding the inturned edge and adjacent wall part, whereby these parts are reversed on a new fold line and the turned in edge is enclosed in the middle of the triple fold.

6. The process of making on paper shells a multiple infolded margin having, with the I inclusion of the adjacent wall part, an odd number of folds, which includes the steps of infolding the margin, and then abruptly infolding the wall and inturned margin on a new fold line, whereby the previously in' turned part is reversed, 'and repeating the last named step.

7. In the process of making a multiple fold interlocked seam between a paper shell and a flanged head, the steps of turning in the edge of ,the shell with the head Harige between the shell wall and the inturned edge part, and abruptly turning in the inturned parts on a new fold line, whereby the previously inturned parts are reversed and an interlocked lseam is produced. 5

8. In-- the process of making a multiple fold interlocked scam between a paper shell and a flanged paper head, the steps of advancing a spinning tool relativelyv to the relatively rotating shell edge and thereby turning in the shell edge with the lid flange between it and the shell wall, and then abruptly advancing the spinning tool relative to lthe relatively rotating shell and head flange, whereby the previously inturned parts are abruptly reversed and an interlocked seam is produced.

9. In the proces of making a multiple fold interlocked spun joint between a paper shell and the flange of an'inscrted flan ed paper head, the steps of inturning the e ge of the shell over the edge of the head flange by advancing a spinning tool relatively thereto while shell and head vare being rotatedwith respect to the spinning tool, and then abruptly advancing the spinning tool relatively to the relatively rotating shell and head, whereby the edge of the head flange, the inturned shell edge and the adjacent shell wall are abruptly reversed on a new fold line and an interlocked seam is produced.

10. In the process of making a-multiple substantially parallel fold interlocked Seam between a paper shell ,and an inserted flanged paper head, the steps of rotating shell and\head relative to a spinning tool having a part extending across the end of the shell and a part extending inwardly substantially parallel to the shell wall to keep the parts substantially in parallelism, advancing the spinning tool relative to the shell and head to turn the edge of the shell in over the edge of the head flange and then abruptly advanlng the spinning tool rela.- tive to the relatively rotating shell and head and moving the inwardly extending tool inwardly toward the .shell axis to accommodate eXtra thicknesses, whereby the inturned edge, the head flange and adjacent shell wall are abruptly inturned in reverse relation and an interlocked seam produced with the folds thereon in substantial parallelism.

In testimony whereof, I have signed my name hereto.

ARLINGTON MOORE. 

